Plumb-bob.



W. LOBVEN.

PLUMB BOB.

APLIGATIO'N FILED MAY 3, 1906.

Patented May 18, 1909.,

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WILLIAM LOEVEN, OF CHICAGO, ILLINOIS.

PLUMB-B 0B Specification of Letters Patent.

Patented May 18, 1909.

Application filed May 3, 1906. Serial N0. 314,995.

To all whom t may concern:

Be it known that I, VILLIAM LOEVEN, a citizen of the United States,residing at Chicago, in the county of Cook and State of Illinois, haveinvented certain new and useful Improvements in Plumb-Bobs, of which thefollowing is a specication.

This invention relates to devices for ascertaining whether parts of abuilding structure are at a true perpendicular and if not, to whatextent they are out of plumb.

The particular invention which forms the subject matter of thisapplication comprises a plummet, means for attaching same to a steelsquare, and means for adjusting the plummet relative to its attachingmeans.

In the accompanying' drawing which forms a part of this application Figure 1 shows in elevation a carpenters square to which my invention isattached; Fig. 2 is an edge view on an enlarged scale of the attachingportion of the device; Fig. 3 is a vertical section, on an enlargedscale through the plumb-bob, and Fig. 4t is a fragmentary detail showingan adjusting element which jjn'eferably forms a part of my invention.

Referring to the details of the drawing L1 represents an ordinary steelsquare adapted to have my plummet attached thereto.

5 represents an angle bracket to the sides of which along the verticaledge 10 are secured by rivets 7, 7, two plates 6, 6, which arepreferably made of spring steel and have their free vertical edges 12pressed inwardly toward each other as shown in Fig. f2, to eliect africtional gripping' action on the sides of the square. The outer end ofthe bracket is formed with a circular lug 8 through which a verticalhole 9 extends.

A cord 13 is passed through the hole 9, and is held therein by a knot14, or by a knot and a plate 19, the latter having two holes there- I inthrough which the cord passes, as shown in Fig. 4L. The bob 15 having anextension 1G is secured on the opposite end of the cord the latterpassing through a vertical hole 16 and secured in a horizontal hole 17which intersects the hole 16, so that the bob will hang in alinementwith the cord. The lower end of the bob has a point 18 which registerswith the scale lines on the square when the device is in use.

The devices are designed to be made so that the distance from the hole 9to the straight edge 10 is exactly three inches, hence the bob point 18should register with the scale line on the horizontal member of thesquare which is three inches from the outer edge of the vertical memberof the square, and should it not do so, the deviation from a trueright-angle, of the parts to which the square is applied, will beclearly indicated.

lf in the use of this device it should be desirable to adjust the bob ata greater or less distance from the bracket, the suspending cord may betaken up or let out by pulling same through the plate 19 as will bereadily understood.

Having thus described my invention what I claim, is:-

A plummet consisting of two plates spaced apart to receive andfrictionally engage a square, a bracket rigidly secured to said plates,a cord slidably arranged in said bracket, a plate adapted to hold saidcord against accidental movement, and a bob secured to one end of saidcord.

In testimony whereof I aiiX my signature in presence of two witnesses.

WILLIAM LOEVEN.

Witnesses WM. B. MOORE, F. BENJAMIN.

